Novel gas-water separator for hydrogen fuel cell

Abstract

The utility model relates to the field of vehicle hydrogen fuel cell gas-water separators, in particular to a novel gas-water separator for a hydrogen fuel cell. The shell is formed by combining a front cover and a rear cover; a separation plate I is arranged in the shell and is divided into a separation cavity and a water storage cavity which are communicated by the separation plate I up and down, an air inlet pipe and an air outlet pipe which are communicated with the separation cavity are arranged on the shell, and a water outlet pipe communicated with the water storage cavity is also arranged on the shell; the separation cavity is provided with a plurality of groups of separation plates II along an airflow circulation path; the multiple second separation plates are arranged in a front-back staggered mode, so that the flow speed and the flow direction of airflow are changed in the moving process along a bent route, the airflow sequentially acts on the first separation plates to form condensate water, and then multi-stage gas-water separation is completed. According to the utility model, the flowing speed and direction of gas are reduced and changed for multiple times, so that the gas flowing path is prolonged, the collision probability of the gas and the separation plate II is increased, and the separation of liquid water is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydrogen fuel cell gas water separator for vehicle, especially a new type of gas water separator for hydrogen fuel cell. BACKGROUND

[0002] The current global environmental pollution and greenhouse effect problem is increasingly serious, and it is imminent to explore and develop low-carbon environmental protection clean energy technology. Among them, hydrogen fuel cell is to produce electricity and water by electrochemical reaction of hydrogen and oxygen, and the product is only water without other pollutants. It is widely concerned because of its advantages of clean, low carbon, high efficiency and no pollution. The fuel cell reaction generates water, and the water permeates through the proton exchange membrane between the cathode and anode to the anode, resulting in the existence of reaction generated water and gas humidified water in the exhaust gas discharged from the fuel cell anode. Due to the excess coefficient of hydrogen gas introduced in the reaction process to ensure the reaction efficiency, part of the hydrogen gas will be discharged with the generated water. If this part of hydrogen gas is directly involved in the circulation, it will cause harm to the hydrogen pump blades in the system and also cause the system fuel cell stack to be flooded, affecting the system performance, so a gas water separator needs to be installed at the hydrogen outlet of the fuel cell stack to separate the water mixed in this part of hydrogen gas and discharge it in time, and the separated hydrogen gas is sent back to the stack to participate in the reaction. The common water separator is mainly of baffle type and cyclone type structure design. The baffle type structure is simple and easy to integrate, but the size is large and the water separation efficiency is limited. The cyclone type structure is complex and difficult to integrate, which increases the manufacturing cost and processing difficulty. Therefore, in order to solve the above problems, the existing gas water separator needs to be designed and optimized.

[0003] Chinese patent with publication number CN117443088A discloses a hydrogen fuel cell gas water separator for vehicle and a drainage control method, which adopts a cyclone type structure design including spiral blades, hollow cavity, drainage liquid level stabilizer, horizontal and vertical drainage plates and many shock absorption holes and other components, which is relatively complex in structure and is not conducive to production and manufacturing. CN202322982179 discloses a new type of gas water separator, which adopts a two-stage separation chamber to separate the hydrogen gas from the anode outlet with excessive humidity. The baffle of each separation chamber is a circular rotating baffle, and when the gas entering the separation chamber reaches the baffle, the gas rotates at high speed and separates the liquid water, achieving the effect of gas water separation. The disadvantage of this method is that the baffle structure is relatively complex, and only the gas is rotated, which cannot well increase the path and collision probability of hydrogen gas flow. The flow paths of separated gas and liquid water are not well distinguished. UTILITY MODEL CONTENTS

[0004] In view of the problems in the background art, a new type of gas water separator for hydrogen fuel cell is proposed.

[0005] The utility model provides a kind of for hydrogen fuel cell new type's gas-water separator, including the shell being combined by front cover and back cover;Separation plate one is arranged in shell, and is separated by separation plate one on the upper and lower separation cavity and water storage cavity being communicated, gas inlet pipe and gas outlet pipe being communicated separation cavity are arranged on shell, water outlet pipe being communicated water storage cavity is also arranged;Separation cavity is arranged multiple sets of separation plate two along airflow flow route;Multiple sets of separation plate two are staggered and arranged before and after, so that airflow changes flow velocity and flow direction during moving along curved route, condensate water is formed in turn with separation plate one, and then multiple-stage gas-water separation is completed.

[0006] Preferably, separation plate two is provided with three groups, the first group and the third group are installed on the front cover, and the second group is installed on the back cover.

[0007] Preferably, the height of the three groups of separation plate two is set to 60%-70% of the depth of the separation cavity, and the thickness of the three groups of separation plate two is set to 5-6mm.

[0008] Preferably, the gas inlet pipe is located above the first group of separation plate two.

[0009] Preferably, the gas outlet pipe is located on one side of the third group of separation plate two.

[0010] Preferably, the separation plate one is provided with a through hole communicating the separation cavity and the water storage cavity.

[0011] Preferably, the separation plate two is made of condensing material.

[0012] Preferably, the thickness of the shell is 20-23mm.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects: by alternately distributing separation plate two on the front and rear housings of the water separator, and arranging separation plate one with a through hole between the separation cavity and the water storage cavity, the flow velocity and direction of the gas are reduced and changed multiple times, the gas flow path is lengthened, the collision probability of the gas with the separation plate two is increased, which is beneficial to the separation of liquid water. For multi-stage gas-water separation of hydrogen gas with water, the humidity of hydrogen gas at the gas outlet is better reduced, which is beneficial to maintaining the system performance of the hydrogen fuel cell. In addition, the water separator has a simple structure, low manufacturing and processing difficulty, and is beneficial to production and manufacturing. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the appearance view of the gas-water separator for hydrogen fuel cell new type;

[0015] Fig. 2 It is the internal view of the gas-water separator for hydrogen fuel cell new type.

[0016] Mark: 1, front cover;2, back cover;3, gas outlet pipe;4, gas inlet pipe;5, water outlet pipe;6, separation cavity;7, water storage cavity;8, separation plate one;9, separation plate two. DETAILED DESCRIPTION

[0017] As Figs. 1-2 shown, the utility model provides a kind of for hydrogen fuel cell new type's gas-water separator, including by front cover 1 and rear cover 2 combination and form shell;Separation plate one 8 is arranged in shell, and is separated by separation plate one 8 and is separated into the separation cavity 6 and water storage cavity 7 of communication one above another, gas inlet pipe 4 and air outlet pipe 3 being set on shell and communicate separation cavity 6, also set water outlet pipe 5 and communicate water storage cavity 7;Separation cavity 6 is provided with multiple sets of separation plate two 9 along the route of airflow flow;Multiple sets of separation plate two 9 are staggered and arranged front and back, so that airflow changes flow velocity and flow direction during moving along curved route, in turn with separation plate one 8 and form condensate water, and then complete multistage gas-water separation.

[0018] In further implementation, separation plate two 9 is provided with three groups, and the first group and the third group are installed on front cover 1, and the second group is installed on rear cover 2.Through front and back alternate separation plate two 9, reduce the flow velocity of airflow, change the flow direction of airflow, and then realize layer-by-layer water-gas separation.

[0019] In further implementation, the height of three groups of separation plate two 9 is set to 60%-70% of the depth of separation cavity 6, and the thickness of three groups of separation plate two 9 is set to 5-6mm.

[0020] In further implementation, gas inlet pipe 4 is located above the first group of separation plate two 9.After gas-water mixture enters the shell, it collides with the first group of separation plate two 9 first, and the flow velocity and flow direction of gas-water change for the first time.

[0021] In further implementation, air outlet pipe 3 is located on one side of the third group of separation plate two 9.Before gas-water mixture leaves the shell, it collides with the third group of separation plate two 9, and the flow velocity and flow direction of gas-water change for the third time.

[0022] In further implementation, separation plate one 8 is provided with through holes communicating separation cavity 6 and water storage cavity 7, which can prevent the risk of liquid water stored in water storage cavity 7 from splashing and re-entering the airflow.

[0023] In further implementation, separation plate one 8 is made of condensing material; by cooling gas-water, water vapor condenses into liquid water, and finally flows into water storage cavity.

[0024] In further implementation, the thickness of shell is 20-23mm.

[0025] The working principle is as follows: the gas from the fuel cell stack enters the shell from the gas inlet pipe 4 of the water segregator, first reaches the separation chamber 6, and first collides with the first set of separation plates two 9 in the separation chamber 6, at this time, the flow speed of the gas is reduced and the flow direction is changed for the first time, when the gas encounters the separation plates one 8, the water vapor is condensed into liquid water and flows into the water storage chamber 7, and the first-stage separation of the water vapor in the gas is started. Subsequently, the gas after the first-stage separation flows through the second set of separation plates two 9 and collides with them, the flow speed of the gas is further reduced, the flow direction is changed for the second time, when the gas encounters the separation plates one 8, the water vapor is condensed into liquid water and flows into the water storage chamber 7, and the second-stage separation of the gas and the liquid water is realized. Subsequently, the gas after the second-stage separation flows through the third set of separation plates two 9 and collides with them, the flow speed of the gas is reduced again, the flow direction is changed for the third time, when the gas encounters the separation plates one 8, the water vapor is continuously condensed into liquid water and flows into the water storage chamber 7, and the third-stage separation of the gas and the liquid water is realized. The flow speed and the flow direction of the gas are changed each time when the gas flows through the separation plates two 9, after three collisions, the flow path of the gas is prolonged, the collision probability is increased, through the action of the separation plates one 8, the separation rate of the condensed water is improved, the multi-stage gas-water separation of the hydrogen gas with water is realized, and the working efficiency of the gas-water separator is improved.

[0026] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to this, various changes can be made within the knowledge range possessed by the person skilled in the art without departing from the purpose of the utility model.

Claims

1. A new type of gas-water separator for hydrogen fuel cells, characterized by, The shell is combined by the front cover (1) and the rear cover (2); the shell is provided with the separation plate one (8) and is separated into the communicating separation cavity (6) and the water storage cavity (7) by the separation plate one (8); the shell is provided with the air inlet pipe (4) and the air outlet pipe (3) which communicate with the separation cavity (6) and is provided with the water outlet pipe (5) which communicates with the water storage cavity (7); The separation cavity (6) is provided with multiple groups of the separation plate two (9) along the air flow route; the multiple groups of the separation plate two (9) are staggered in front and back, so that the air flow changes the flow velocity and the flow direction in the moving process along the curved route, sequentially acts with the separation plate one (8) to form the condensed water, and then completes the multi-stage air-water separation; The separation plate two (9) is provided with three groups, the first group and the third group are installed on the front cover (1), and the second group is installed on the rear cover (2); The separation plate one (8) is provided with the through hole which communicates with the separation cavity (6) and the water storage cavity (7); The thickness of the shell is 20-23mm.

2. The gas-water separator for a hydrogen fuel cell according to claim 1, wherein The height of the three groups of the separation plate two (9) is set as 60%-70% of the depth of the separation cavity (6), and the thickness of the three groups of the separation plate two (9) is set as 5-6mm.

3. The gas-water separator for a hydrogen fuel cell according to claim 1, wherein The air inlet pipe (4) is located above the first group of the separation plate two (9).

4. The gas-water separator for a hydrogen fuel cell according to claim 1, wherein The air outlet pipe (3) is located on one side of the third group of the separation plate two (9).

5. The gas-water separator for a hydrogen fuel cell according to claim 1, wherein The separation plate two (9) is the condensing material.

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